Air pre-heater

Abstract

The utility model discloses an air pre-heater in the technical field of air pre-heater sealing, which comprises an air pre-heater central cylinder, a fan-shaped plate guide plate is mounted above the outer wall of one side of the air pre-heater central cylinder, and a gravity sensing type self-compensation sealing device is mounted on one side below the fan-shaped plate guide plate. The gravity sensing type self-compensating sealing device is arranged, the gravity sensing type self-compensating sealing device is used, namely, the gravity sensing effect of the heavy hammer is utilized, the heavy hammer is placed on the placing seat at one end of the lever for balancing weight, the other end of the lever is installed on the inner side suspension piece, the suspension piece is always pried by utilizing the weight of the heavy hammer, and the gravity sensing effect of the heavy hammer is achieved. The supporting device provides supporting force for the air pre-heater, so that the air pre-heater is always kept at a constant position and does not sink, the air pre-heater is always kept sealed, and the situation that the radial outer side of the hot end of the air pre-heater is heated and deformed in the working process to generate a large gap to affect sealing is avoided as much as possible.

Description

Technical Field

[0001] The utility model relates to the technical field of air preheater sealing, in particular to an air preheater. Background Art

[0002] An air preheater is a device used to heat the air entering the combustion chamber. Its main function is to improve combustion efficiency, reduce energy consumption, and reduce the content of emissions. Air preheaters are usually installed in boilers or burner systems. By heating the cooled air through the preheater and then sending it into the combustion chamber, the amount of fuel used can be reduced and the combustion efficiency can be improved. Air preheaters can adopt different working principles and materials, such as plate heat exchangers, spiral heat exchangers, etc. By using air preheaters, energy can be effectively saved, operating costs can be reduced, and it is also beneficial to environmental protection. At present, the air leakage of rotary air preheaters mainly exists in the radial direction of the hot end. After the preheater is heated, the rotor will produce mushroom-shaped thermal deformation. On the radial outside of the hot end, a large gap will be generated between the deformed rotor and the hot end fan plate, causing the air preheater to have an increased air leakage rate. The traditional technology is to install the sealing sheet on the rotor partition. When the partition is thermally deformed, the sealing sheet will also deform together, so the gap here cannot be controlled.

[0003] Therefore, it is necessary to develop an air preheater. Utility Model Content

[0004] The utility model aims to provide an air preheater, which is provided with a gravity-sensing self-compensating sealing device. The gravity-sensing self-compensating sealing device uses the gravity-sensing effect of a heavy hammer, and the heavy hammer is placed on a placement seat on one end of a lever for counterweight. The other end of the lever is installed on an inner suspension sheet, and the weight of the heavy hammer is used to pry the suspension sheet at all times to provide it with a supporting force, so that it always remains in a constant position and does not sink, thereby achieving a sealed air preheater at all times, and minimizing the heat deformation of the radial outer side of the hot end of the air preheater during operation to produce a large gap that affects the sealing, thereby effectively improving the use effect of the air preheater. At the same time, the utility model has a simple design, is compact and convenient, has a low cost, and is highly expansible, so as to solve the problem of poor sealing of the air preheater and affecting its use proposed in the above-mentioned background technology.

[0005] To achieve the above object, the utility model provides the following technical solution: an air preheater, comprising an air preheater central tube, a sector plate guide is installed above one side of the outer wall of the air preheater central tube, and a gravity induction self-compensating sealing device is installed on one side below the sector plate guide;

[0006] A cantilever seal assembly A is installed on the other side below the sector plate guide plate, and a cantilever seal assembly B is installed on one side of the gravity-sensing self-compensating seal device.

[0007] Preferably, a hot end center tube sealing plate is provided between the sector plate guide plate and the air preheater center tube, and an angle steel gap filling plate is provided at the lower side edge of the sector plate guide plate.

[0008] Preferably, the gravity-sensing self-compensating sealing device comprises a shell, a cover is installed on one side of the shell, and connecting seats are installed at the front and rear ends of the shell.

[0009] Preferably, a lever is rotatably connected to the upper part of the interior of the shell, one end of the lever is rotatably connected to a placement seat, and a heavy hammer is installed above the placement seat.

[0010] Preferably, the cantilever sealing assembly A is a single partition A, an outer sealing sheet A is provided on one outer wall of the single partition A, an outer pressure plate A is provided on one outer wall of the outer sealing sheet A, an inner angle plate A is installed on the other outer wall of the single partition A, an inner suspension sheet A is provided on one outer wall of the inner angle plate A, and an inner pressure plate A is provided on one outer wall of the inner suspension sheet A.

[0011] Preferably, the cantilever sealing assembly B is a single partition B, an outer wall on one side of the single partition B is provided with an outer sealing plate C, an outer wall on one side of the outer sealing plate C is provided with an outer pressure plate C, an inner angle plate C is installed on the other outer wall of the single partition B, an inner suspension plate C is provided on one outer wall of the inner angle plate C, and a retaining frame A is provided on one outer wall of the inner suspension plate C.

[0012] Preferably, the cantilever sealing assembly A is a double partition A, an outer sealing plate B is provided on one outer wall of the double partition A, an outer pressure plate B is provided on one outer wall of the outer sealing plate B, an inner angle plate B is installed on the other outer wall of the double partition A, an inner suspended plate B is provided on one outer wall of the inner angle plate B, and an inner pressure plate B is provided on one outer wall of the inner suspended plate B.

[0013] Preferably, the cantilever sealing assembly B is a double partition B, an outer sealing plate D is provided on one outer wall of the double partition B, an outer pressure plate D is provided on one outer wall of the outer sealing plate D, an inner angle plate D is installed on the other outer wall of the double partition B, an inner suspended plate D is provided on one outer wall of the inner angle plate D, and a retaining frame B is provided on one outer wall of the inner suspended plate D.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] A gravity-sensing self-compensating sealing device is provided. The function of the gravity-sensing self-compensating sealing device is to use the gravity-sensing effect of a heavy hammer. The heavy hammer is placed on a placement seat on one end of a lever for counterweight, and the other end of the lever is installed on the inner suspension sheet. The weight of the heavy hammer is used to pry the suspension sheet at all times to provide it with supporting force, so that it always remains in a constant position and does not sink, thereby achieving constant sealing of the air preheater and avoiding the situation where the radial outer side of the hot end of the air preheater is heated and deformed during operation to produce a large gap that affects the sealing. The use effect of the air preheater is effectively improved. At the same time, the design is simple, compact and convenient, low cost and highly expansible.

[0016] The sealing sheet and the rotor partition can be separated and are no longer affected by the deformation of the rotor. The inner suspended sheet uses a gravity-sensing self-compensating sealing device to always seal the "triangle" air leakage area at the hot end of the air preheater. It can also be applied to various loads of the air preheater and is constant and effective. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The overall structural diagram provided by the utility model;

[0018] Figure 2 A schematic cross-sectional view of the structure of the gravity-sensing self-compensating sealing device provided by the utility model;

[0019] Figure 3 A schematic diagram of a top-view cross-sectional structure of a gravity-sensing self-compensating sealing device provided by the utility model;

[0020] Figure 4 A schematic diagram of the fixed end structure of a single partition provided in Example 1 of the utility model;

[0021] Figure 5 A schematic diagram of a single partition floating end structure of a first embodiment of the utility model;

[0022] Figure 6 A schematic diagram of the fixed end structure of the double partition provided in the second embodiment of the utility model;

[0023] Figure 7 This is a schematic diagram of the double partition floating end structure of Example 2 provided by the utility model.

[0024] In the figure: 1. air preheater center tube; 2. sector plate guide plate; 3. hot end center tube sealing plate; 4. angle steel gap filler; 5. gravity sensing self-compensating sealing device; 501. shell; 502. cover; 503. connection seat; 504. lever; 505. placement seat; 506. weight; 6. cantilever sealing assembly A; 611. single partition A; 612. outer sealing plate A; 613. outer pressure plate A; 614. inner angle plate A; 615. inner suspension plate A; 616. inner pressure plate A; 621. double partition A; 622 , outer sealing piece B; 623, outer pressure plate B; 624, inner angle plate B; 625, inner suspension piece B; 626, inner pressure plate B; 7, cantilever sealing assembly B; 711, single partition B; 712, outer sealing piece C; 713, outer pressure plate C; 714, inner angle plate C; 715, inner suspension piece C; 716, retaining frame A; 721, double partition B; 722, outer sealing piece D; 723, outer pressure plate D; 724, inner angle plate D; 725, inner suspension piece D; 726, retaining frame B. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Embodiment 1:

[0027] The utility model provides the following technical solutions: an air preheater, please refer to Figure 1-5 , comprising an air preheater central tube 1, a fan-shaped plate guide plate 2 is installed above the outer wall of one side of the air preheater central tube 1, a hot end central tube sealing plate 3 is arranged between the fan-shaped plate guide plate 2 and the air preheater central tube 1, and an angle steel gap filling plate 4 is arranged at the edge of one side below the fan-shaped plate guide plate 2;

[0028] A gravity-sensing self-compensating sealing device 5 is installed on one side below the sector plate guide 2. The gravity-sensing self-compensating sealing device 5 includes a shell 501, a cover 502 is installed on one side of the shell 501, and a connecting seat 503 is installed at the front and rear ends of the shell 501. A lever 504 is rotatably connected to the upper part of the shell 501, and one end of the lever 504 is rotatably connected to a placement seat 505. A weight 506 is installed above the placement seat 505. The shell 501 and the cover 502 on the gravity-sensing self-compensating sealing device 5 are arranged so that they are in a closed state after installation. By arranging the lever 504 in a rotatable connection manner on the upper part of the shell 501, the lever 504 is restricted by the position of the rotatable connection, so that one end of the lever 504 is subjected to force and the other end is tilted, thereby achieving the principle of the lever. By arranging the placement seat 505 in a rotatable connection manner at one end of the lever 504, and placing the weight 506 on the placement seat 505, according to the influence of the weight of the counterweight of the weight 506, the effect of tilting one end of the lever 504 can be produced.

[0029] A cantilever seal assembly A6 is installed on the other side below the sector plate guide plate 2. The cantilever seal assembly A6 is a single partition A611. An outer sealing sheet A612 is provided on one outer wall of the single partition A611. An outer pressure plate A613 is provided on one outer wall of the outer sealing sheet A612. An inner angle plate A614 is installed on the other outer wall of the single partition A611. An inner suspension sheet A615 is provided on one outer wall of the inner angle plate A614. An inner pressure plate A616 is provided on one outer wall of the inner suspension sheet A615. The outer sealing sheet A612 and the outer pressure plate A613 are installed on one outer wall of the single partition A611. On the side outer wall, the inner suspension sheet A615 is installed on the other side outer wall of the single partition A611 by the inner angle plate A614, and then fixed by the inner pressure plate A616 with bolts or nuts for fixing, so that the outer sealing sheet A612 and the inner suspension sheet A615 can be installed. After the installation, the outer sealing sheet A612 and the inner suspension sheet A615 can be used to seal the air preheater. At the same time, the inner suspension sheet A615 is an integrated through-length structure, and is similar to a knife handle, forming one end of the inner suspension sheet A615 suspended between the inner angle plate A614 and the inner pressure plate A616;

[0030] A cantilever seal assembly B7 is installed on one side of the gravity-sensing self-compensating seal device 5. The cantilever seal assembly B7 is a single partition B711. An outer sealing sheet C712 is provided on one outer wall of the single partition B711. An outer pressure plate C713 is provided on one outer wall of the outer sealing sheet C712. An inner angle plate C714 is installed on the other outer wall of the single partition B711. An inner suspension plate C715 is provided on one outer wall of the inner angle plate C714. A retainer A716 is provided on one outer wall of the side suspension sheet C715. The outer sealing sheet C712 is installed on one outer wall of the single partition B711 with the outer pressure plate C713, and the inner suspension sheet C715 is installed on the other outer wall of the single partition B711 with the inner angle plate C714. The retainer A716 is then fixed with bolts or nuts for fixing. The outer sealing sheet C712 and the inner suspension sheet C715 can be fixed. After installation, the outer sealing sheet C712 and the inner suspension sheet C715 can be installed to seal the air preheater. At the same time, the inner suspension sheet C715 is an integrated through-length structure, and is similar to a knife handle, forming an inner suspension sheet C715 at one end suspended between the inner angle plate C714 and the retaining frame A716. The gravity-sensing self-compensating sealing device 5 uses the gravity-sensing effect of the weight 506 to place the weight 506 on the placement seat 505 on one end of the lever 504 for counterweight. The weight of the weight is used to pry the suspension sheet to provide it with support force, so that it can always remain in a constant position to ensure that it does not sink. It can be more secure and more effectively kept in a constant position to maintain a constant suspension effect, so as to achieve the air preheater always being sealed, and to avoid the radial outer side of the hot end of the air preheater being deformed by heat during operation to produce a large gap that affects the sealing.

[0031] Working principle: When using the utility model, the shell 501 and the cover 502 on the gravity-sensing self-compensating sealing device 5 are installed so that they are in a closed state. The lever 504 is arranged on the upper part of the shell 501 in a rotating connection manner, so that the lever 504 is restricted by the position of the rotating connection, so that one end of the lever 504 is subjected to force and the other end is tilted, thereby achieving the principle of the lever. The placement seat 505 is arranged at one end of the lever 504 in a rotating connection manner, and the weight 506 is placed on the placement seat 505. According to the influence of the weight of the weight 506, one end of the lever 504 can be tilted. By matching the outer sealing sheet A612 with the outer pressure plate A6 13 is installed on the outer wall of one side of the single partition A611, and the inner suspension sheet A615 is installed on the outer wall of the other side of the single partition A611 by the inner angle plate A614, and then the inner pressure plate A616 is fixed with bolts or nuts for fixing, so that the outer sealing sheet A612 and the inner suspension sheet A615 can be installed. After the installation, the outer sealing sheet A612 and the inner suspension sheet A615 can be sealed for the air preheater. At the same time, the inner suspension sheet A615 is an integrated through-length structure, and is similar to a knife handle, forming one end of the inner suspension sheet A615 suspended between the inner angle plate A614 and the inner pressure plate A616. By fixing the outer sealing sheet C 712 is installed on the outer wall of one side of the single partition B711 with the outer pressure plate C713, and the inner suspension sheet C715 is installed on the outer wall of the other side of the single partition B711 by the inner angle plate C714, and then fixed by the retaining frame A716 with the fixing bolts or nuts, so that the outer sealing sheet C712 and the inner suspension sheet C715 can be installed. After the installation, the outer sealing sheet C712 and the inner suspension sheet C715 can be sealed for the air preheater. At the same time, the inner suspension sheet C715 is an integrated through-length structure, and is similar to a knife handle, forming one end of the inner suspension sheet C715 suspended between the inner angle plate C714 and the retaining frame A716, The gravity-sensing self-compensating sealing device 5 uses the gravity-sensing effect of the weight 506 to place the weight 506 on the placement seat 505 on one end of the lever 504 for counterweight. The weight of the weight is used to pry the suspension sheet at all times to provide it with supporting force, so that it can always remain in a constant position to ensure that it does not sink. It can be more secure and more effectively kept in a constant position to maintain a constant suspension effect, so as to always keep the air preheater sealed, and try to avoid the radial outer side of the hot end of the air preheater from being deformed by heat during operation to produce a large gap that affects the sealing. The use effect of the air preheater is effectively improved. At the same time, the design is simple, compact and convenient, low cost and highly expansible.

[0032] Embodiment 2:

[0033] The utility model provides the following technical solutions: an air preheater, please refer to Figure 6-7 , comprising an air preheater central tube 1, a fan-shaped plate guide plate 2 is installed above the outer wall of one side of the air preheater central tube 1, a hot end central tube sealing plate 3 is arranged between the fan-shaped plate guide plate 2 and the air preheater central tube 1, and an angle steel gap filling plate 4 is arranged at the edge of one side below the fan-shaped plate guide plate 2;

[0034] A gravity-sensing self-compensating sealing device 5 is installed on one side below the sector plate guide 2. The gravity-sensing self-compensating sealing device 5 includes a shell 501, a cover 502 is installed on one side of the shell 501, and a connecting seat 503 is installed at the front and rear ends of the shell 501. A lever 504 is rotatably connected to the upper part of the shell 501, and one end of the lever 504 is rotatably connected to a placement seat 505. A weight 506 is installed above the placement seat 505. The shell 501 and the cover 502 on the gravity-sensing self-compensating sealing device 5 are arranged so that they are in a closed state after installation. By arranging the lever 504 in a rotatable connection manner on the upper part of the shell 501, the lever 504 is restricted by the position of the rotatable connection, so that one end of the lever 504 is subjected to force and the other end is tilted, thereby achieving the principle of the lever. By arranging the placement seat 505 in a rotatable connection manner at one end of the lever 504, and placing the weight 506 on the placement seat 505, according to the influence of the weight of the counterweight of the weight 506, the effect of tilting one end of the lever 504 can be produced.

[0035] A cantilever sealing assembly A6 is installed on the other side below the sector plate guide plate 2. The cantilever sealing assembly A6 is a double partition A621. An outer sealing sheet B622 is provided on one side outer wall of the double partition A621. An outer pressure plate B623 is provided on one side outer wall of the outer sealing sheet B622. An inner angle plate B624 is installed on the other side outer wall of the double partition A621. An inner suspension sheet B625 is provided on one side outer wall of the inner angle plate B624. An inner pressure plate B626 is provided on one side outer wall of the inner suspension sheet B625. The outer sealing sheet B622 is installed on one side outer wall of the double partition A621 with the outer pressure plate B623, and the inner suspension sheet B625 is provided by the inner angle plate B6 24 is installed on the outer wall of the other side of the double partition A621, and then fixed by the inner pressure plate B626 with bolts or nuts for fixing, so that the outer sealing sheet B622 and the inner suspension sheet B625 can be installed. After the installation, the outer sealing sheet B622 and the inner suspension sheet B625 can be sealed for the air preheater. At the same time, the inner suspension sheet B625 is an integrated through-length structure, and is similar to a knife handle, forming one end of the inner suspension sheet B625 suspended between the inner angle plate B624 and the inner pressure plate B626. By adopting the installation method of the double partition A621, its overall stability is increased, and it is also suitable for the installation method of air preheater equipment of different specifications;

[0036] A cantilever seal assembly B7 is installed on one side of the gravity-sensing self-compensating seal device 5. The cantilever seal assembly B7 is a double partition B721. An outer sealing sheet D722 is provided on one side of the outer wall of the double partition B721. An outer pressure plate D723 is provided on one side of the outer wall of the outer sealing sheet D722. An inner angle plate D724 is installed on the other side of the outer wall of the double partition B721. An inner suspension plate D725 is provided on one side of the outer wall of the inner angle plate D724. A retaining frame B is provided on one side of the outer wall of the inner suspension plate D725. 726, the outer sealing sheet D722 is installed with the outer pressure plate D723 on the outer wall of one side of the double partition B721, and the inner suspension sheet D725 is installed on the outer wall of the other side of the double partition B711 by the inner angle plate D724, and then the retaining frame B726 is fixed with the fixing bolts or nuts to achieve the installation of the outer sealing sheet D722 and the inner suspension sheet D725. After the installation, the outer sealing sheet D722 and the inner suspension sheet D725 can be used for air preheater. The inner suspension piece D725 is an integrated through-length structure, and is similar to a knife handle, forming an inner suspension piece D725 at one end suspended between the inner angle plate D724 and the retaining frame B726. The gravity-sensing self-compensating sealing device 5 uses the gravity-sensing effect of the weight 506 to place the weight 506 on the placement seat 505 on one end of the lever 504 for counterweight. The weight of the weight is used to pry the suspension piece and provide it with support so that it can always remain in a constant position to ensure that it does not sink. It can be more secure and more effectively kept in a constant position to maintain a constant suspension effect, so as to always keep the air preheater sealed, and try to avoid the situation where the radial outer side of the hot end of the air preheater is heated and deformed during operation to produce a large gap that affects the sealing. The sealing piece and the rotor partition can be separated and are no longer affected by the deformation of the rotor. The inner suspension piece uses the gravity-sensing self-compensating sealing device to always seal the "triangle" air leakage area at the hot end of the air preheater. It can also be applied to various loads of the air preheater, which is constant and effective.

[0037] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An air preheater, comprising an air preheater central tube (1), a sector plate guide plate (2) being installed above one side outer wall of the air preheater central tube (1), characterized in that: A gravity-sensing self-compensating sealing device (5) is installed on one side below the sector plate guide plate (2); A cantilever seal assembly A (6) is installed on the other side below the sector plate guide (2), and a cantilever seal assembly B (7) is installed on one side of the gravity-sensing self-compensating seal device (5).

2. An air preheater according to claim 1, characterized in that: A hot end center tube sealing sheet (3) is provided between the sector plate guide plate (2) and the air preheater center tube (1), and an angle steel gap filling sheet (4) is provided at a lower side edge of the sector plate guide plate (2).

3. An air preheater according to claim 1, characterized in that: The gravity-sensing self-compensating sealing device (5) comprises a shell (501), a cover (502) is installed on one side of the shell (501), and a connecting seat (503) is installed at the front end and the rear end of the shell (501).

4. An air preheater according to claim 3, characterized in that: A lever (504) is rotatably connected to the upper part of the interior of the housing (501), one end of the lever (504) is rotatably connected to a placement seat (505), and a heavy hammer (506) is installed above the placement seat (505).

5. The air preheater according to claim 1, characterized in that: The cantilever sealing assembly A (6) is a single partition A (611), one side outer wall of the single partition A (611) is provided with an outer sealing sheet A (612), one side outer wall of the outer sealing sheet A (612) is provided with an outer pressure plate A (613), the other side outer wall of the single partition A (611) is installed with an inner angle plate A (614), one side outer wall of the inner angle plate A (614) is provided with an inner suspension sheet A (615), one side outer wall of the inner suspension sheet A (615) is provided with an inner pressure plate A (616), and the inner suspension sheet A (615) is an integrated through-length structure.

6. An air preheater according to claim 1, characterized in that: The cantilever seal assembly B (7) is a single partition plate B (711), one side outer wall of the single partition plate B (711) is provided with an outer sealing sheet C (712), one side outer wall of the outer sealing sheet C (712) is provided with an outer pressure plate C (713), the other side outer wall of the single partition plate B (711) is installed with an inner angle plate C (714), one side outer wall of the inner angle plate C (714) is provided with an inner suspension plate C (715), one side outer wall of the inner suspension plate C (715) is provided with a retaining frame A (716), and the inner suspension plate C (715) is an integrated through-length structure.

7. An air preheater according to claim 1, characterized in that: The cantilever sealing assembly A (6) is a double partition A (621), one side outer wall of the double partition A (621) is provided with an outer sealing sheet B (622), one side outer wall of the outer sealing sheet B (622) is provided with an outer pressure plate B (623), the other side outer wall of the double partition A (621) is installed with an inner angle plate B (624), one side outer wall of the inner angle plate B (624) is provided with an inner suspension sheet B (625), one side outer wall of the inner suspension sheet B (625) is provided with an inner pressure plate B (626), and the inner suspension sheet B (625) is an integrated through-length structure.

8. An air preheater according to claim 1, characterized in that: The cantilever seal assembly B (7) is a double partition plate B (721), one side outer wall of the double partition plate B (721) is provided with an outer sealing plate D (722), one side outer wall of the outer sealing plate D (722) is provided with an outer pressure plate D (723), the other side outer wall of the double partition plate B (721) is installed with an inner angle plate D (724), one side outer wall of the inner angle plate D (724) is provided with an inner suspension plate D (725), one side outer wall of the inner suspension plate D (725) is provided with a retaining frame B (726), and the inner suspension plate D (725) is an integrated through-length structure.

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